S
M
T
W
T
F
S
29
36°
14°
30
37°
18°
1
35°
13°
2
33°
12°
3
32°
14°
4
34°
14°
5
35°
13°
6
34°
10°
7
32°
13°
8
33°
10°
9
32°
9°
10
32°
9°
11
30°
11°
12
32°
15°
13
35°
17°
14
36°
16°
15
35°
13°
16
34°
22°
17
37°
23°
18
39°
16°
19
38°
19°
20
36°
20°
21
39°
21°
22
40°
17°
23
34°
18°
24
33°
23°
25
38°
26°
26
40°
23°
27
42°
27°
28
43°
19°
29
40°
14°
30
35°
13°
31
35°
12°
1
Hist. Avg.
40°
18°
2
Hist. Avg.
40°
18°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Cheyenne
Cheyenne's December 2026 forecast shows daily high temperatures ranging from 30° to 43°, with overnight lows between 9° and 27°. The average high for December is 36° with an average low of 16°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Cheyenne. See also: January | February | March.
